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Java > Open Source Codes > org > jibx > extras > DiscardElementMapper


1 /*
2 Copyright (c) 2004-2005, Dennis M. Sosnoski
3 All rights reserved.
4
5 Redistribution and use in source and binary forms, with or without modification,
6 are permitted provided that the following conditions are met:
7
8  * Redistributions of source code must retain the above copyright notice, this
9    list of conditions and the following disclaimer.
10  * Redistributions in binary form must reproduce the above copyright notice,
11    this list of conditions and the following disclaimer in the documentation
12    and/or other materials provided with the distribution.
13  * Neither the name of JiBX nor the names of its contributors may be used
14    to endorse or promote products derived from this software without specific
15    prior written permission.
16
17 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
18 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
21 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
24 ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
26 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 package org.jibx.extras;
30
31 import org.jibx.runtime.IMarshaller;
32 import org.jibx.runtime.IMarshallingContext;
33 import org.jibx.runtime.IUnmarshaller;
34 import org.jibx.runtime.IUnmarshallingContext;
35 import org.jibx.runtime.JiBXException;
36 import org.jibx.runtime.impl.UnmarshallingContext;
37
38 /**
39  * <p>Custom marshaller/unmarshaller for arbitrary ignored element. This ignores
40  * an element when unmarshalling, if one is present, and does nothing when
41  * marshalling.</p>
42  *
43  * @author Dennis M. Sosnoski
44  * @version 1.0
45  */
46
47 public class DiscardElementMapper implements IMarshaller, IUnmarshaller
48 {
49     /* (non-Javadoc)
50      * @see org.jibx.runtime.IMarshaller#isExtension(int)
51      */
52     
53     public boolean isExtension(int index) {
54         return false;
55     }
56
57     /* (non-Javadoc)
58      * @see org.jibx.runtime.IMarshaller#marshal(java.lang.Object,
59      * org.jibx.runtime.IMarshallingContext)
60      */
61     
62     public void marshal(Object JavaDoc obj, IMarshallingContext ictx) {}
63
64     /* (non-Javadoc)
65      * @see org.jibx.runtime.IUnmarshaller#isPresent(org.jibx.runtime.IUnmarshallingContext)
66      */
67      
68     public boolean isPresent(IUnmarshallingContext ctx) throws JiBXException {
69         return !ctx.isEnd();
70     }
71
72     /* (non-Javadoc)
73      * @see org.jibx.runtime.IUnmarshaller#unmarshal(java.lang.Object,
74      * org.jibx.runtime.IUnmarshallingContext)
75      */
76      
77     public Object JavaDoc unmarshal(Object JavaDoc obj, IUnmarshallingContext ictx)
78         throws JiBXException {
79         
80         // just discard and return null
81 ((UnmarshallingContext)ictx).skipElement();
82         return null;
83     }
84 }
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